This sound a bit counter intuitive, but im my experience the best way its just to remove your shield (if you have any) and facehug him while spamming the shit of his head. This is the best tactic coz, even if the guy blocks your swing, there is a nice chance that the guy is too slow counter attacking with his slow maul and your spam will hit him in his counter swing anyway. If the guy is good, then the same but dancing around feinting like crazy until you can one hit him with a stab in the neck with your masterwork long spade slavona XD. For the facehuging the pickaxe works great, just spam the left swim until one of you is dead
. Salute.